Answer :

For simple harmonic motion,


where x = displacement


w= angular velocity


A = amplitude


δ = phase


Given:


for both the pendulum the amplitude is given to same and they are identical, their length are the same and thus their angular velocity are also same as for the pendulum , g=acceleration due to gravity and length of the pendulum is given as L.


pendulum 1 we can write,



At



-----(1)


pendulum 1 we can write,



At



-----(2)


For phase difference we subtract (2) from (1), we get,



the phase difference between the two pendulum is of


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